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Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent
This study investigated nutrient removal from anaerobic digestion effluent by cultivating mixed-culture microalgae enriched from anaerobic sludge under different pH conditions: R(UC) (uncontrolled), R(7)(–8) (maintained at 7–8), and R(<8) (maintained below 8). Significant amounts of NH(4)(+)-N we...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8879683/ https://www.ncbi.nlm.nih.gov/pubmed/35208811 http://dx.doi.org/10.3390/microorganisms10020357 |
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author | Yu, Hyeonjung Kim, Jaai Rhee, Chaeyoung Shin, Juhee Shin, Seung Gu Lee, Changsoo |
author_facet | Yu, Hyeonjung Kim, Jaai Rhee, Chaeyoung Shin, Juhee Shin, Seung Gu Lee, Changsoo |
author_sort | Yu, Hyeonjung |
collection | PubMed |
description | This study investigated nutrient removal from anaerobic digestion effluent by cultivating mixed-culture microalgae enriched from anaerobic sludge under different pH conditions: R(UC) (uncontrolled), R(7)(–8) (maintained at 7–8), and R(<8) (maintained below 8). Significant amounts of NH(4)(+)-N were lost by volatilization in R(UC) cultures due to increased pH values (≤8.6) during the early period of cultivation. The pH control strategies significantly affected the biological NH(4)(+)-N removal (highest in R(7)(–8)), microalgal growth (highest in R(7)(–8)), biomass settleability (highest in R(<8)), and microalgal growth relative to bacteria (highest in R(<8)) in the cultures. Parachlorella completely dominated the microalgal communities in the inoculum and all of the cultures, and grew well at highly acidic pH (<3) induced by culture acidification with microalgal growth. Microalgae-associated bacterial community structure developed very differently among the cultures. The findings call for more attention to the influence and control of pH changes during cultivation in microalgal treatment of anaerobic digestion effluent. |
format | Online Article Text |
id | pubmed-8879683 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-88796832022-02-26 Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent Yu, Hyeonjung Kim, Jaai Rhee, Chaeyoung Shin, Juhee Shin, Seung Gu Lee, Changsoo Microorganisms Article This study investigated nutrient removal from anaerobic digestion effluent by cultivating mixed-culture microalgae enriched from anaerobic sludge under different pH conditions: R(UC) (uncontrolled), R(7)(–8) (maintained at 7–8), and R(<8) (maintained below 8). Significant amounts of NH(4)(+)-N were lost by volatilization in R(UC) cultures due to increased pH values (≤8.6) during the early period of cultivation. The pH control strategies significantly affected the biological NH(4)(+)-N removal (highest in R(7)(–8)), microalgal growth (highest in R(7)(–8)), biomass settleability (highest in R(<8)), and microalgal growth relative to bacteria (highest in R(<8)) in the cultures. Parachlorella completely dominated the microalgal communities in the inoculum and all of the cultures, and grew well at highly acidic pH (<3) induced by culture acidification with microalgal growth. Microalgae-associated bacterial community structure developed very differently among the cultures. The findings call for more attention to the influence and control of pH changes during cultivation in microalgal treatment of anaerobic digestion effluent. MDPI 2022-02-03 /pmc/articles/PMC8879683/ /pubmed/35208811 http://dx.doi.org/10.3390/microorganisms10020357 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yu, Hyeonjung Kim, Jaai Rhee, Chaeyoung Shin, Juhee Shin, Seung Gu Lee, Changsoo Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent |
title | Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent |
title_full | Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent |
title_fullStr | Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent |
title_full_unstemmed | Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent |
title_short | Effects of Different pH Control Strategies on Microalgae Cultivation and Nutrient Removal from Anaerobic Digestion Effluent |
title_sort | effects of different ph control strategies on microalgae cultivation and nutrient removal from anaerobic digestion effluent |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8879683/ https://www.ncbi.nlm.nih.gov/pubmed/35208811 http://dx.doi.org/10.3390/microorganisms10020357 |
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